1917 $5 Canadian Bank of Commerce Identification Help

PROMETHIUS88

Trying to identify this particular note but can't find anything out there. I see several of these from 1917 with a letter in front of the serial number but only a couple that were in auctions that don't have the letter. I wasn't able to find anything in regards to the signatures either and they appear to be different. Can anyone help with any additional info, please.
Thank you in advance for any assistance.

Steve_in_Tampa

Here’s several pages of SOLD examples from the Heritage Archives. Some of them have sold for thousands of dollars. https://currency.ha.com/c/search-results.zx?N=56+790+231&Nf=&Ntk=SI_Titles-Desc&Nty=1&Ntt=1917+$5+canadian+bank+of+commerce&limitTo=all&ic3=ViewItem-Auction-Archive-BackToSearch-081514#4021-48004

Greenstang

The signatures are Walker- Aird.
It is the coloured background with CBN variety.

johnny9434

Nice note, I like 👍

PROMETHIUS88

Thanks for all the responses and info. Steve, thank you for the link.
I still had trouble locating anything similar with the Walker-Arid without the letter in front of the serial#. That's what has been throwing me off. May or may not be worth it, but I'm just going to send it in to have it certified.

Greenstang

Not 100% sure but I believe the CBN variety, which yours is, did not have a letter prefix.

Serial_no_8

I believe your note is as @Greenstang noted, the "Walker-Arid" coloured underprint with CBN (at left) variety. See this LINK from Coinsandcanada for relative book values (2nd row up from the bottom).